Typedefs starting with `n' in quake2

• netadr_t 321/qcommon/qcommon.h:539
• netadrtype_t 321/qcommon/qcommon.h:527
• netchan_t 321/qcommon/qcommon.h:594
• netsrc_t 321/qcommon/qcommon.h:529
• NXSoundParameterTag 321/rhapsody/snd_next.m:165